XR20M1280L32-0B Datasheet, PDF (54/63 Pages) Exar Corporation – I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
REV. 1.0.0
FIGURE 24. MODEM INPUT PIN INTERRUPT
SDA
SLAVE
ADDRESS
W A MSR REGISTER A S
SLAVE
ADDRESS
RA
DATA
A
IRQ#
TD2
TD3
MODEM pin
FIGURE 25. GPIO PIN INTERRUPT
ACK from slave
ACK from slave
SDA
SLAVE
ADDRESS
W A GPIOLVL REG . A S
SLAVE
ADDRESS
RA
ACK from m aster
DATA
AP
IRQ #
TD4
TD5
G P IO n
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